Cutter-head setting and gaging device and stand.



0. WE. BLOOD &'0. G. OSTEMAN. CUTTER HEAD SETTING AND GAGINGDEVIGE ANDSTAND,

APPLICATION FILED FEB. 4, 1909.

954312., Patented Apr.12,1910;

UNITED STATES T'f CHARLES W. H. BLOOD, OF WINTHROP, AND CARL G. OSTEMAN,OF DORCI-IESTER, MASSACHUSETTS, ASSIGNORS TO S. A. WOODS MACHINECOMPANY, OF BOSTON,

MASSACHUSETTS.

CUTTER-HEAD SETTING AND GAGING DEVICE AND STAND.

To all whom it may concern:

Be it known that we, CHARLES W. H. BLooD, a citizen of the UnitedStates, and

resident of lVinthrop, in the county of Suffolk and State ofMassachusetts, and CARL G. OSTEMAN, a citizen of the United States, andresident of Dorchester, in the county of Suffolk and State ofMassachusetts, have invented an Improvement in Cutter-Head Setting andGaging Devices and Stands, of which the following description, inconnection with the accompanying drawings, is a specification, likenumerals on the drawings representing like parts.

The object of our invention is to provide exceedingly sensitive andaccurate means for setting and for gaging the cutters of a cutterhead.

Also further features of our invention provide an apparatus especiallyadapted for setting and gaging matcher heads or other verticalcutterheads.

Preferably we employ a roll carried by a movable holder for cooperatingwith the cutters of the cutterhead. When a cutter touches the roll thelatter tends to move, and we have found that the minutest degree ofinaccuracy in the cutter can be felt by means of this sensitiveresponsiveness of the roll, so that our mechanism enables us to detectby sense of feeling, the very smallest errors in setting or inadjustment. This applies equally to the adjustment of the cutters in andout and also transversely.

A further feature of our invention resides in providing a roll having anedge surface the exact duplicate in shape of the edge of the stock, sothat thereby the grooving cutters for instance, or the tonguing cutterscan be accurately set or gaged at their upper and lower cutting edges.

Our invention includes various other features which will be pointed outin the description and claims.

In the drawings we have shown a preferred embodiment of our invention.

Figure 1 shows the machine in front elevation; Figs. 2 and 3 are viewsin side elevation of two forms of gaging and setting rolls; Fig. 4 is asectional detail taken vertically at the pin 4, Fig. 1; Fig. 5 is a sec-Specification of Letters Patent.

Application filed February 4, 1909.

Patented Apr. 12, 1910.

Serial No. 475,991.

cap or sleeve 6 threaded at 7 to receive a clamping nut 8, and betweenthe shaft 5 and cap or sleeve is a taper sleeve 9 actuated by a bolt 10agalnst the resistance of a bolt 11 for accurately centering acutterhead such,

for instance, as indicated at 12, to be then clamped by the nut 8. Atits opposite ends the slide 2 is provided with similar journal bearings13, 14, deflected rearwardly sufiiciently to bring their centers intoalinement with the shaft 5, see Fig. 6, in which are supported stubshafts or spindles 15, 16, adjusted by hand screws 17, 18, respectively,which bear against the lower ends of said shafts in opposition tosprings 19. Cooperating with these end members or journal bearings 13,14, are opposite stops 20, 21, threaded at their inner ends in thestand, to be rotated independently by knurled shoulders or nuts 22.

Secured to the stub shafts 15 and 16 are gaging and setting rolls havinga peripheral contour corresponding accurately to that of the edge orsurface of the stock when planed, the roll 23, as herein shown,corresponding to the groovededge of a board, and the roll 24 to thetongued edge of a board, the latter being shown in further detail inFig. 2, while in Fig. 3 we have shown a roll 25 corresponding to theedge of aboard provided with a usual groove 26 and having an adjacentbeveled edge 27. We show this roll simply to indicate more clearly thefact that our invention is applicable to any and all shapes or contours,it being understood that the required roll is simply placed on the stubshaft 15 or 16 in the operative position shown 'in Fig. 1 whenever it isdesired to set or gage a cutterhead for cutting that particular pattern.Preferably the holding spindle 5 is positively positioned, a bolt orlocking pin 28 normally held inward by a spring 29 being shown asadapted to lock into grooves or notches 30 in the lower end of saidshaft. Said pin preferably has one edge beveled at 31 so as to permitthe shaft and cutterhead to be rotated in one direction, a handle 32being provided for turning said locking pin so as to permit the shaft tobe rotated in the other direction when desired. One purpose of thislocking pin is to enable the operator to know when a given cutter isbrought into correct position with reference to the adjacent truing rollor device as 24 The pin notifies the operator by its clicking sound andalso by its halting efiect on the spindle and cutterhead.

We have described our invention in its various details of embodiment asherein shown in the preferred form, although it will be understood thatwe do not intend to limit our invention to this construction as it iscapable of a wide range of embodinients.

In use, the operator, having clamped the cutterhead in accuratelycentered position on the spindle or shaft 5 to correspond exactly to itsposition in a planer, accurately adjusts the adjacent stop 20 or 21 soas to stop the adjacent roll in true centering or gaging position. Thereupon the proper roll is put into position on its shaft 15, 16, andthe slide 2 is moved longitudinally until the end 13 or 14, the case maybe, strikes against the adjacent stop. Thereupon the slide is clampedimmovably by turning the hand bolt i. Let it be supposed that themachine is to set or gage a cutterhead for cutting a tongued edge of theboard in accordance with the roll 24:. The spindle 16 having beenaccurately adjusted vertically by the hand screw 18 until the tongue 33is in the desired accurate position, the cutterhead is turned so as tobring a cutter into cooperation with said roll 24.. If the cutter is toofar forward it will be crowded back into accurate position by itsengagement with the roll 2%. If it is too low the correct amount whichit must be raised will be indicated by the upper surface 34- of saidprojecting portion 33, and if it is too high the correct position willbe indicated by the opposite under surface 35. In the preferredembodiment of our invention the roll will crowd the cutter into properposition and this result is accomplished for each cutter in successionmerely by rotating the shaft 5 step-by-step, the pin 28 serving to haltthe cutterhead at the right instant when its edge is in the plane whichincludes the axes of the two shafts 5, 16, said locking pin or latchalso serving to hold the head so as to permit the knife or cutter to betightened or loosened. If it is merely desired to test or gage thecutterhead our apparatus permits this to be done with extreme rapidityas well as accuracy, inasmuch as the slightest contact of a cutter withthe adjacent roll enables the operator to feel the same through hisgrasp of the roll. By having the gage roll exactly the same in edgecontour and size as the lumber, all the cutters are readily brought intothe desired planes. It is customary to set part of the blades to outagainst the up per side of the wood (for a tongue or groove) and theother blades to out against the under side, and this result isaccurately and quickly accomplished simply by having the gaging rollcorrespond exactly to the required edge-shape of the lumber. The rollcan be used for gaging, 2'. 6., testing whether the cutters are setcorrectly in the head and also can be used for setting 2'. 6., itselfmoving the cutters if incorrect. It will be understood that the termroll includes any swinging device having a sector shape, whether acomplete roll or not, and by the terms tongue and groove we mean toinclude any forwardly projecting swinging angular surface and anyrearwardly extending angular surface, as, for instance, not only 26, butalso 27. It will be understood that while we prefer a roll, certain ofour claims hereinafter contained, are not restricted thereto, and thesame remark applies to the various other details of construction.

Having described our invention, what we claim as new and desire tosecure by Letters Patent of the United States is,

1. In an apparatus of the kind described, a stand, a slide mounted toslide transversely across said stand, means to mount a cutterhead torotate on said stand intermediate the ends of said slide, and gagingdevices carried at the opposite ends of said slide at a distance apartgreater than the diameter of the cutterhead and in position to engagealternately said cutterhead according as the slide is moved lengthwisein one direction or in the other.

2. In an apparatus of the kind described, a stand, a slide mounted toslide transversely across said stand, means to mount a cutterhead torotate on said stand intermediate the ends of said slide, gaging devicescarried at the opposite ends of said slide at a distance apart greaterthan the diameter of the cutterhead and in position to engagealternately said cutterhead according as the slide is moved lengthwisein one direction or in the other, and adjustable stop means to limit thelongitudinal movement of the slide with reference to the cutterhead.

3. In an apparatus of the kind described, a stand, a slide mounted toslide transversely across said stand, means to mount a cutterhead torotate on said stand intermediate the ends of said slide, and gagingdevices carried at the opposite ends of said slide at a distance apartgreater than the diameter of the cutterhead in the same plane with theaxis of the means on which the cutterhead is mounted, and in position toengage alternately said cutterhead according as the slide is movedlengthwise in one direction or the other.

4. In an apparatus of the kind described, a stand, a slide mounted toslide transversely across said stand, means to mount a cutterhead torotate on said stand intermediate the ends of said slide, rotary gagingclevices carried at the opposite ends of said slide at a distance apartgreater than the diameter of the cutterhead and in position to engagealternately said cutterhead according as the slide is moved lengthwisein one direction or in the other, and adjustable stop means to limit thelongitudinal movement of the slide with reference to the cutterhead.

5. In an apparatus of the kind described, a stand, a shaft mounted insaid stand, an externally threaded sleeve centered on said shaft toreceive a cutterhead, a clamping nut having threaded engagement withsaid sleeve for clamping said cutterhead to rotate with relation to saidstand, and a gaging devicecarried by said stand in position to gage thecutters in said cutterhead as the latter is rotated.

6. In an apparatus of the kind described, a stand, a shaft mounted insaid stand, an externally threaded sleeve centered on said shaft toreceive a cutterhead, a clamping nut having threaded engagement withsaid sleeve for clamping said cutterhead to rotate with relation to saidstand, a gage roll and its supporting means carried by said stand togage the cutters in said cutterhead including means to adjust said rolltransversely of said cutters and means to adjust said rolllongitudinally of said cutters.

7 In an apparatus of the kind described, a stand, a shaft mounted insaid stand, an externally threaded sleeve centered on said shaft toreceive a cutterhead, a clamping nut having threaded engagement withsaid sleeve for clamping said cutterhead to rotate with relation to saidstand, a gage roll carried by said stand, a tubular hearing in whichsaid gage roll is journaled parallel to said shaft, a spring in saidtubular bearing tending to move said roll in one direction, andslow-motion adjusting means for moving said roll in an oppositedirection.

8. In an apparatus of the kind described, a stand, a shaft mounted insaid stand, an externally threaded sleeve centered on said shaft toreceive a cutterhead, a clamping nut having threaded engagement withsaid sleeve for clamping said cutterhead to rotate with relation to saidstand, a gage roll carried by said stand, and yielding looking meansyielding to permit the cutterhead to be rotated step by step in onedirection and to prevent rotation thereof in an opposite direction, saidlocking means being arranged to halt the cutterhead when a blade thereofis opposite the gage roll.

9. In an apparatus of the kind described, a stand, a shaft mounted insaid stand, an externally threaded sleeve to receive a cutterhead,centering means centering and clamping said sleeve on said shaft, saidshaft and sleeve being rotatable together, a clamping nut havingthreaded engagement with said sleeve for clamping said cutterhead, and agaging device carried by said stand in position to gage the cutters insaid cutterhead as said shaft is rotated.

10. In an apparatus of the kind described, means for supporting acutterhead in position to have its cutters gaged and set, and gaging andsetting means comprising a r0- tary gaging device having an angulargaging edge to correspond to the shape of the cutters, and adjustingmechanism for adjusting said rotary device transversely of saidcutterhead, said cutterhead supporting means including clamping means tomaintain said cutterhead in an unvarying predetermined axial position,whereby said angular edged rotary gaging device and said cutterheadcooperate accurately for each cutter of the latter.

11. In an apparatus of the kind described, means for supporting acutterhead in position to have its cutters gaged and set, and gaging andsetting means comprising a rotary gaging device having an angular gagingedge to correspond to the shape of the cutters, adjusting mechanism foradjusting said rotary device transversely of said outterhead, saidcutterhead supporting means including clamping means to maintain saidcutterhead in an unvarying predetermined axial position, whereby saidangular edged rotary gaging device and said cutterhead cooperateaccurately for each cutter of the lat ter, said cutterhead supportingmeans being normally free to rotate with relation to said rotary gagingdevice, and means for automatically holding said cutterhead stationarywhen being gaged by said gaging device, whereby the operator is free totighten or loosen the cutters as required by said gaging device.

12. In an apparatus of the kind described, means for supporting acutterhead in position to have its cutters gaged and set, and gaging andsetting means comprising a rotary gaging device having an angular gagingedge to correspond to the shape of the cutters, and adjusting mechanismfor adand also to and from said cutterhead, said & 954,712

cutterhead supporting means including names to this specification, inthe presence clamping means to maintain said cutterhead of twosubscribing witnesses. in an unvarying predetermined axial posi- CHARLESW. H. BLOOD. tion, whereby said angular edged rotary CARL G. OSTEMAN. 5gaging device and said cutterhead co'ciperate Vitnesses:

accurately for each cutter of the latter. GERARD L. PARKER,

In testimony whereof, we have signed our V. E. CHADBOURNE.

